Lecture 6 - ELBOW & RADIOULNAR JOINT Flashcards
(17 cards)
What are the ligaments of the elbow? And their role?
Radial collateral ligament = lateral support & rarely injured
Ulnar collateral ligament = medial support to prevent from abducting when stressed
Annular ligament = provides a sling effect around radial head for stability
What are the degrees of flexion and extension in the elbow? Supinate and pronate?
0 degrees of extension
145 to 150 degrees of flexion
80 to 90 degrees from neutral to supination
70 to 90 degrees from neutral to pronation
What type of joint is the elbow joint?
Hinge joint
What are the elbow flexors? elbow extensors? radioulnar pronators? radioulnar supinators?
Elbow flexors = Bicep brachii, brachialis, brachioradialis, weak assistance from pronator teres
Elbow extensors = Tricep brachii, weak assistance from anconeous
Radioulnar pronators = Pronator teres, pronator quadratus, brachioradialus
Radioulnar supinators = Bicep brachii, supinator, brachioradialis
What is tennis elbow?
AKA lateral epicondylitis
Common problem involving extensor digitorum
Associated with gripping & lifting activities
What is golfer’s elbow?
AKA medial epicondylitis
Less common than tennis elbow
Where is the radial nerve originate from? supply?
C5 - C8 Tricep Brachii Brachioradialis Supinator Anconeous = Posteriolateral arm, forearm and hand
Where is the median nerve originate from? supply?
C6 - C7
Pronator teres
Pronator quadratus
= Palmar aspect of hand
Where is the muscolocutaneous nerve originate from? supply?
C5 - C6
Bicep brachii
Brachialis
= front of arm
OINA of Bicep Brachii?
O - short head = coracoid process
long head = supraglenoid tubercle
I - radial tuberosity of radius
N - musculocutaneous nerve
A - flexion at elbow and supinationOINA of Brachialis?
O - distal half of humerus
I - coronoid process
N - musculocutaneous nerve
A - flexion
OINA of Brachioradialis?
O - lateral supracondylar ridge
I - radial styloid process
N - radial nerve
A - some pronation, some supination, elbow flexion
OINA of Triceps Brachii?
O - Lateral head = proximal 1/2 of humerus
Long head = infragelnoid tubercle
Medial head = distal 2/3 of humerus
I - olecranon process
N - radial nerve
A - elbow extension
OINA of Anconeous?
O - lateral condyle (back of capitulum)
I - posterior proximal ulna
N - radial nerve
A - elbow extension
OINA of Supinator?
O - lateral epicondyle & post proximal ulna
I - proximal radius
N - radial nerve
A - supination
OINA of Pronator Teres?
O - medial epicondyle
I - median 1/3 of radius
N - median nerve
A - pronation
OINA of Pronator Quadratus?
O - distal 1/3 of ulna
I - distal 1/4 of radius
N - median nerve
A - pronation
